Pump piston



Nov. 2,926. 1,605,900

L. D. MOWREY PUMP PISTON Filed August 28, 1925 lll ATTORNEY-www-/rnembersw'rll provide inside expansion on Patented Nov. 2, i926.

narran erases PUMP PISTON.

Appiicationeiea- August as, 1925. serial No. 53,016..

. This .inventionl relatesI to improvements in oil wellpumps' and insuch connection it relates more particularly .to the novel" arrangementandv Vconst-ruction of the parts thereof.

A particular object of theinvention is toy provide a pump of this naturehaving a traveling valve withv cups and compression members incombination with a gas and sand trap. i

Another object of the invention is t'o pro'- vide compression memberswi'tlirelatedparts so arranged and constructed that theywill maintain.perfect packingA Contact to the pump barrel'. j

.A further'object. is" that thel compression the downward stroke of thepump,l and' give a circulating motion. to'` 4the i'uidA andleliminat'ing sediment onztlie.con'ipre.s'sion meinbers and parts.

Thenew and improved. combination pump andl gas trap will be' betterunderstood by reference to the following detailed description taken inconnection with the accompanying drawings forming part hereof and inwhich:

Figure 1 is a longitudinal sectional view of the pump in two sections,one section in broken formation.

Figure 2 is a side View of broken formation.

Figures 3, il, 5 and 6 are cross-sectional views along the lines 3-3, 44, 5-5 and 6,6 respectively, of Figures 1 and 2.

Describing the drawing more in detail a plunger P is shown in twosections in Figure 2 with connection 1 to a sucker rod for reciprocatingthe plunger. The plunger has a ball valve 3 and 4 and standing ballvalve 5, and a liquid outlet 6 into 'the pump barrel 7.

On the upper end of the plunger l? are disposed four compression memberspreferably of leather, the upper one 8 having a rounded portion 9 andhaving its upper edge disposed in an annular groove 10. The lower partof the compression member 8 is disposed under a shoulder 11 on theplunger. The plunger as will be observed has spaced apertures 12-12 forthe passage of the fluid against the compression members in the liftingoperation of the liquid. Below the compression member 8 is a spacer ring13 which closely lits the rounded portion 9 of the member. The spacerring 13 has a the plunger in shoulder 14?* to receive the bevell'ed edgeof its compression member 14,v the lower' end ofthe memberll; enclosingthe bottomr edge of the ring1'3. The next spacer ring 15 andycompression member 16V are of'the sameconstruction as those justdescribed.v The bottom' compression member 17'v and its spacer ringlSare likewise. of tl'ie'same construction, except that there are noperforation's in the plunger P adjacent' these two last members.

Below the upper compression members and spacer rings is thel ball valve31 in,v its cage 19with seat 20. The, seat' is the' upper partof a head21 which connectsjthe p'lungn er sections. c Valve lLis seated' onthe'top of one@lower-.pilaar caterer prima' of compression' members,y2.2, 23' and: ,251e l It' will bei seen that this.' section "of theplunger has a shouldera23fto-jsea't,the first co`ni} r es sionnie'mbier22 wllthe .next ttvn such rings" 26%26".

Particular attention is called to the last compression member 24 whichis inverted and is spaced apart from the upper member 23. Attention isalso directed to the fact thatl the lower compression member is the onlyone in the lower plunger section which has apertures 28. Below th-emembers ljust described is the standing ball valve 5 which is seated ina head 29 connecting the sand trap. The sand trap is also in twosect-ions 30-30 connected by a head 31.

The head 29 has spaced vertical chambers 32-32 for escaping gas passingupwardly between the pump barrel 7 and a tubular member 33 which extendsabove the plunger a short distance. The gas passes through the annularspace 34.

Secured to the head 32 is a tubular member 35 and surrounding the member35 is a larger tubular member 36. A third tubular member 38 enclosesmember 36 and is secured to head 31, channeled at 39 for the passage ofthe liquid entering through the sand trap 30 through openings tO- 40.The sand trap is closed at its lower end and has anainner pocket 41 alsoclosed at the lower en In the operation of the pump the oil enteringapertures 40-'-vl0 on the upward stroke of the pump plunger is drawninwardly and passes through channels 39-39 and between the tubularmember 38 and the trap wall 30 in the direction of the arrows and passesmembers, 'l23,--23'zine` carried on the 'spacer' l downwardly inside themember 38, thence upwardly into tubular member 36 and into the pumpbarrel. As the liquid is drawn upward at the point A sand ,will be drawndownward and fall into the trap member 4l. Sand will also collect inmember 30 as the oil enters.

On the upward stroke of the pump the oil entering the plunger andpassing through the apertures 12-12 will force the members ll, lil, 16and 17 against the barrel and produce a perfect packing Contact tobarrel. rIhis operation also gives a circulating motion to the fluid anddoes not permit sediment to settle on compression members or plungerwhich would cause packing to cut and also cause plunger to stick inbarrel. rl`he perforations under the bottom cup provides insideexpansion on the downward stroke of the pump.

Y That is claimed is: y

l. An oil well pump comprising a pump barrel, a tubular plungerreciprocable in the pump barrel; a plurality 'of compression members onthe upper part of the plunger, spacer rings between said compressionmembers, spaced perforations inl the plunger walls adjacent saidcompression members to cause the fluid onv thefupward stroke of theplunger to be forced through said perforations and against saidcompression members tocause the latter to bear against the pump barrel;a plurality of compression members on the lower portion of the plunger,spacer rings between said lower disposed compression members, one ofwhich has its rim directed downwardly and provided with per vforationsto permit the fluid to force it against thelpum'p barrel on the downwardstroke ofthe plunger; and ball valves between the upper and lowerportions of said Plungen 5 2. An oil well pump, comprising a pumpbarrel, a tubular plunger reciprocable within the pump barrel, saidplunger consisting of two sections joined by a connecting head, a ballvvalve on opposite ends of the head and a ball valve below the end ofvthe plunger, openings 'in the top andv bottom of said plunger, forpassage of liquid controlled by said Valves; lsaid plunger sectionsprovided with a plurality .of compression members, spaced perforationsin the walls of the plunger sections, the compression members beingseparatedby .spacer rings, one yof the compression memberson theA lowersection ofthe plunger beinginverted with its riml directed downwardly.'v

In testimony whereof'havefsigned my name to this speoiicationi` LESTER1D.; MOWREY.

